Inner micrometer size 13
Inner micrometer size 13
(OP)
In a set of inner micrometer , why are they 2 odd size ?
size 13 and size 25
Why not 11 or 12 or 17 ?
Who invented it and why ?
size 13 and size 25
Why not 11 or 12 or 17 ?
Who invented it and why ?

RE: Inner micrometer size 13
Who invented it? From google - https://www.higherprecision.com/learning-center/fa...
"A man named William Gascoigne invented the very first micrometer in the 1600s. "
A bigger question, is why do you keep asking stupid questions that are easily answered by a google search?
RE: Inner micrometer size 13
https://www.higherprecision.com/products/micromete...
TTFN (ta ta for now)
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